https://www.databasestar.com/oracle-remainder-mod/
The Oracle MOD function performs a “modulo division” on the numbers you specify. A modulo division is where a division is performed using two numbers, and the remainder is returned by the function.
For example, the division of 8/5 is 1.6. Using modulo division, 8/5 will work out there is one 5 contained in the 8, with 3 left over. The MOD function would return 3 in this example.
The syntax of the MOD function is:
MOD(numerator, denominator)
The numerator is the number mentioned first in the division, or the one that is on top of the division sign. In a division such as 15/4, this would be the 15.
The denominator is the number mentioned second in the devision, or hte one that is on the bottom of the division sign. In a division such as 15/4, this would be the 4.
The parameters can be any numeric data type, and the return type depends on these parameters. This means MOD can return a whole number or a decimal number.
The calculation for the Oracle MOD function is: numerator - denominator * FLOOR(numerator / denominator).
If the denominator is 0, the function returns the value of the numerator. This is done to prevent “divide by 0” errors.
For more information about the MOD function, including how to return every second row, how it’s different to REMAINDER, and to see the SQL code used in these examples, read the related article here:
https://www.databasestar.com/oracle-remainder-mod/

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